* sdk: Add concurrent support for rand 0.7 and 0.8
* Update rand, rand_chacha, and getrandom versions
* Run command to replace `gen_range`
Run `git grep -l gen_range | xargs sed -i'' -e 's/gen_range(\(\S*\), /gen_range(\1../'
* sdk: Fix users of older `gen_range`
* Replace `hash::new_rand` with `hash::new_with_thread_rng`
Run:
```
git grep -l hash::new_rand | xargs sed -i'' -e 's/hash::new_rand([^)]*/hash::new_with_thread_rng(/'
```
* perf: Use `Keypair::new()` instead of `generate`
* Use older rand version in zk-token-sdk
* program-runtime: Inline random key generation
* bloom: Fix clippy warnings in tests
* streamer: Scope rng usage correctly
* perf: Fix clippy warning
* accounts-db: Map to char to generate a random string
* Remove `from_secret_key_bytes`, it's just `keypair_from_seed`
* ledger: Generate keypairs by hand
* ed25519-tests: Use new rand
* runtime: Use new rand in all tests
* gossip: Clean up clippy and inline keypair generators
* core: Inline keypair generation for tests
* Push sbf lockfile change
* sdk: Sort dependencies correctly
* Remove `hash::new_with_thread_rng`, use `Hash::new_unique()`
* Use Keypair::new where chacha isn't used
* sdk: Fix build by marking rand 0.7 optional
* Hardcode secret key length, add static assertion
* Unify `getrandom` crate usage to fix linking errors
* bloom: Fix tests that require a random hash
* Remove some dependencies, try to unify others
* Remove unnecessary uses of rand and rand_core
* Update lockfiles
* Add back some dependencies to reduce rebuilds
* Increase max rebuilds from 14 to 15
* frozen-abi: Remove `getrandom`
* Bump rebuilds to 17
* Remove getrandom from zk-token-proof
#### Problem
The existing append_accounts returns a vector of offsets, which accounts-db
later uses it to infer the storage size of each account. However, such inference
does not apply to the new hot/cold storage format.
#### Summary of Changes
This PR changes the return value of append_accounts() to `Vec<StoredAccountInfo>`,
which includes both offset and storage size information of an account.
This PR makes all the StoredAccountMeta fields pub(crate)
and provides getter functions to access its member fields.
This PR is a preparation step for abstracting out StoredAccountMeta.
#### Problem
As we start supporting new storage formats, those account-meta
structs will be shared by different storage formats and thus need
a new home.
#### Summary of Changes
This PR creates meta.rs under account_storage and moves all the account-meta
structs out from append_vec.rs.
* Introduce record locks on txs that will be recorded
* Add tests for LockedAccountsResults
* Fix broken bench
* Exit process_entries on detecting conflicting locks within same entry
* Move append_vec bench to the crate with append_vec
* Use black_box to tell the compiler not to optimize away test data
```
pub fn black_box<T>(dummy: T) -> T {
unsafe {
let ret = std::ptr::read_volatile(&dummy);
std::mem::forget(dummy);
ret
}
}
```
* Revert "Use black_box to tell the compiler not to optimize away test data"
This reverts commit 5610b8ee957f1d8bf6e270e392859e8b23b1e472.
* Use black_box to tell the compiler not to optimize away test data
* Create bench directories